Hi! On Oct 16 I went to a Urogynecologist for a recurring UTI. That was a Tuesday, she prescribed Cephalexin which I took 2 that day and 2 on Wed. By night time I was feeling rather icky. On Thursday I felt awful as I didn't sleep all night. All day I felt the worst I ever felt in my life and I'm 82!! I stopped taking the pills and am slowly feeling better. Only thing is it is affecting my legs, the UTI and med! On September 20th I went to ER with weak legs and they kept me because of UTI. They put me on a iv antibiotic which helped . I was in hospital til sept 24 where I went to rehab for 18 more days! My legs got really good and I was walking 3 mi a day! Then I went to this Urogynecologist who checked me and put me on Cephalexin. Why do some meds make me react like this? It's like a spasm in my legs. It lasts only seconds but it scares me terribly! Any ideas? And